Belt-controller for dynamo-machines



(No Model.) I 2'SheetsSheet- 1.

4 B. F. RADPORD. BELT CONTROLLER FOR DYNAMO MACHINES.

No. 350,154. Patented Oct, 5, 1886.

(No Model.) 2 Sheets-Sheet 2.

B. P. RADFORD.

BELT CONTROLLER FOR DYNAMO MAGHINES.

No. 350,154. v Patented Oct. 5, 1886.

UNITED STATES PATENT OFFICE.

BENJAMIN F. RADFORD, OF HYDE PAR-K, MASSACHUSETTS.

BELT-CONTROLLER FOR DYNAMO-MACHINES.

.EZF'ECIPICATION forming part of Letters Patent No. 350,154, datedOctober 5, 1886,

Application filed February 19, 1886. Serial No. 192,511. (No model.)

To aZZ whom, it may concern.-

Be it known that I, BENJAMIN F. RADFORD, of Hyde Park, county ofNorfolk, and State of Massachusetts, have invented an Improvement inBelt-Controllers for Dynamo-Machines, of which the followingdescription, in connection. with the accompanying drawings, is aspecification, like letters on the drawings representing like parts.

Dynamo or magnetoeleelric machines or motors in electric-light stationsare now usually driven by means of belts extended from frictionalclutch-pulleys on a line of main shafting, the said belts being extendedabout the pulleys on thearmature-shafts of such machines, and to stopany one or all of theseries of machines the friction-1uilley upon whichis placed the driving-belt for the dynamo-machines to be stopped isreleased from the part of the frictionqmlley which is fast upon the mainshaft, thus permitting that part of the frictio11- ulley which receivesthe belt about it to run loose on its part of the main shaft.

I am also aware that the frame of adynamo has been pivoted at one end,and that a screw at its other end has been used to cause the beltpulleyon the armature-shaft to be forced more or less closely into the bightof the belt en1- ployed to drive the said shaft, the adjustment of theframe of the machine enabling the tension of the saidv drivingbelt to beadjusted as desired.

In the invention herein contained thescries of dynamo ormagneto-electric machines or -motors are driven from a main or othershaft located below and having its axis of rotation substantiallyparallel to the axis of rotation of the armature-shafts of thedynamo-machines to be driven, the dynamo-machines or their bed-platesbeing adjustably supported in such manner as to enable the pulleys ontheir-shafts tobe made to approach or to recede from the pulleys on themain shaft, to slackcn or tighten the drivingbelts, thus permitting thesaid machines to be stopped orstarted, thebelts, when the machines arelowered, falling by gravity away from and hanging slightly below theordinary belt-pulleys keyed upon the main or other driving shaftemployed to actuate the series of dynamo or magneto-electric machines ormotors. In this way, whenany machine is lowered, the rotation of itsarmatureshaft j ustable stop screw or bolt b stops, and its belt hangsbelow but substantially out of contact with the pulley for driving it,the said pulley, however, cont-inuingto move at the speed due to themotion of the main or other dynamo driving shaft.

Figure 1 is a plan view of a dynamo-machine provided with my improvedadjusting mechanism, the commutator being omitted and the armature-shafton that side of the machine being broken off; Fig. 2, a side view of adynamo-machine provided with my improved adjusting mechanism, andlocated above the floor, and driven by a belt on a pulley keyed to amain driving-shaft below the said floor, the supporting-beams for theadj usting mech anism and the floor and its sup )orting-beams being insection; Fig. 3, a right-hand end view of Fig. 1, with thearmaturcpnlley removed; and Fig. 4 a sectional view of Fig. l in line aa', looking toward the left.

The dynamo or magneto-electric machine or motor A, having a bed, a, andan armatureshaft, a, provided with a belt-pulley, a, is and may be ofany well-known type now commonly in use. The bed 0, herein shown, issecured at one end by bolts a to the axle a, (see Fig. 4,) adapted totip or turn in bear ings at, having arms a", which, as herein shown, areextended into cylindrical guides a, integral with the plates b. (SeeFigs. 1 and 2.) Each guide a, as herein shown, is slotted at one side,as at 1/, (see Fig. 4,) to facilitate the entrance of the arms at, theinward movement of each of said arms being limited by the ad- Theslotted side of each guide is provided with carsb, (see Fig. 2,) toreceive a bolt, b, by which the arm a is securely held in its adj ustedposition with in said guide. The plates b receive bolts b", that serveto secure the said cylindrical guides to the supporting-beam b the beamresting upon timbers I) on the floor (1".

As herein shown, the bed a at its opposite end has secured to it, bybolts 0*, (see Fig. 3,) a plate, 0, provided with upwardly-pro ectinghubs c, which receive the shaft 0 having its ends placed in hubsof theyoke-pieces c" c. The yokes referred to receive theadjustable supportsfor the bed of the machine, the said supports, as herein shown,consisting of screwthreaded spindles 0 which are by their threadedportions made to engagea threaded part,

free to rock in its bearings a permits the dynamo-machine to be tippedor lowered from a normal or substantially horizontal to an abnormal oroblique position when either of the spindles c is revolved in thedirection of the arrow 2. (See Fig. 1.) The revolution of the spindles cin the direction mentioned permits the pulley a" to approach the maindrivingpulley e", which permits the belt e, passed over the saidpulleys, to fall by gravity away from the pulley c, which done,-thepulley a is no longer driven positively, and the armatureshaft a ceasesto rotate and the dynamo-machine is stopped. 1 y The shaft 6" hashearings in journal-boxes 6, supported in a bracket, e ,by

screws 0 passing through said bracket and engaging the said boxes, asshown in Fig. 2, the said bracket being herein shown as attached toacross-p1ece, e", bolted to the floor-supporting beams or joists 0 Whenit is desired to start the dynamo or magnetoelectric machine or motor,which has been-rendered inoperative, as above described, elther spindleis revolved in a direction reverse to that indicated by the arrow 2,thus elevih l g the said machine from its obllque Into a substantiallyhorizontal position, causing the pulley a" of the said machine to recedetrom the main drivin ulley 6 thereby llftlng the belt 6 into contactwith the said mam P l y, thus starting the rotation of the pulley a, andthe armature-shaft a.

111 g- 2 I have shown a beltrest, 7*, which occupies a positiona shortdistance below the bell? d pulley e", the said rest, when thedynamo-machine is lowered, receiving the belt uP011 and immediately asthe belt touches the rest it bulges laterally away from the puly 62 111the dotted line 2 z, and sufficiently far 5061691 the belt being thusrelieved from an rubbing friction.

I cl im:-

-A ain or driving shaft provided with amachine or motor having itsarmature-shaft substantially parallel to the said main shaft and locatedabove it, and a belt connecting a pulley on the main shaft with a pulleyon the armature-shaft, combined with a rocking support at one point andan adjustable support at another, whereby the pulley on thearmature-shaft of said machine or motor may be made to approach thepulley on the main shaft to lower the driving-belt below and away fromthe pulley on the driving-shaft and leave the belt at rest, therebystopping the machine or motor, and thereafter to recede from the pulleyon the main shaft to raise the belt into engagement'with the saidmain-shaft pulley and start-the machine in operation, substantially asdescribed.

2. A main or driving shaft provided with a pulley, a belt, a dynamo ormagnetoelectric machine or motor having its armatureshaft provided witha pulley, arocking support, substantially as described..at one end, anda transverse shaft at its other end having screwthreadcd end yokes,combined with screwthreaded spindles entering said yokes, and withchain-wheels and an endless chain engaging said wheels, to operatesubstantially as dynamo or magneto-electric machine or me tor, and abelt connecting a pulley on the dynamo shaft with a pulley on the mainshaft, combined with the rest r, located below the pulley on thedriving-shaft, the said rest, when the machine is inoperative, receivingupon it the belt and supporting the same fromeohtact with saidmain-shaft pulley, to thereby reduce the wear upon the said belt,substantially as described.

,In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

BENJAMIN F. RADFORD.

WVitnesses:

' J AS. H. CHURCHILL, G. W. GREGORY.

